According to Sony's VP of Marketing, Peter Dille, God of War III has sold over 1 million copies in "just a couple days" after being released. While it wasn't specified whether or not those were North American or worldwide sales, God of War III has only been released in North America since March 16, and in Europe and Australia since March 19th and 18th, respectably.
It should prove especially successful for Sony considering both Final Fantasy XIII and MLB 10: The Show were also both released in March. Exact numbers will be released next week when NPD, who track video game sales, publish their March results.
If you haven't tried or picked up God of War III yet, you can check out our full review here.
Source: IGN UK